1 files changed, 97 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/arch/x86/hci/commands/cpuid_cmd.c b/qemu/roms/ipxe/src/arch/x86/hci/commands/cpuid_cmd.c
new file mode 100644
index 000000000..c4e35d179
--- /dev/null
+++ b/qemu/roms/ipxe/src/arch/x86/hci/commands/cpuid_cmd.c
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <stdint.h>
+#include <stdio.h>
+#include <errno.h>
+#include <getopt.h>
+#include <ipxe/cpuid.h>
+#include <ipxe/command.h>
+#include <ipxe/parseopt.h>
+
+/** @file
+ *
+ * x86 CPU feature detection command
+ *
+ */
+
+/** "cpuid" options */
+struct cpuid_options {
+	/** Check AMD-defined features (%eax=0x80000001) */
+	int amd;
+	/** Check features defined via %ecx */
+	int ecx;
+};
+
+/** "cpuid" option list */
+static struct option_descriptor cpuid_opts[] = {
+	OPTION_DESC ( "ext", 'e', no_argument,
+		      struct cpuid_options, amd, parse_flag ),
+	/* "--amd" retained for backwards compatibility */
+	OPTION_DESC ( "amd", 'a', no_argument,
+		      struct cpuid_options, amd, parse_flag ),
+	OPTION_DESC ( "ecx", 'c', no_argument,
+		      struct cpuid_options, ecx, parse_flag ),
+};
+
+/** "cpuid" command descriptor */
+static struct command_descriptor cpuid_cmd =
+	COMMAND_DESC ( struct cpuid_options, cpuid_opts, 1, 1, "<bit>" );
+
+/**
+ * The "cpuid" command
+ *
+ * @v argc		Argument count
+ * @v argv		Argument list
+ * @ret rc		Return status code
+ */
+static int cpuid_exec ( int argc, char **argv ) {
+	struct cpuid_options opts;
+	struct x86_features features;
+	struct x86_feature_registers *feature_regs;
+	uint32_t feature_reg;
+	unsigned int bit;
+	int rc;
+
+	/* Parse options */
+	if ( ( rc = parse_options ( argc, argv, &cpuid_cmd, &opts ) ) != 0 )
+		return rc;
+
+	/* Parse bit number */
+	if ( ( rc = parse_integer ( argv[optind], &bit ) ) != 0 )
+		return rc;
+
+	/* Get CPU features */
+	x86_features ( &features );
+
+	/* Extract relevant feature register */
+	feature_regs = ( opts.amd ? &features.amd : &features.intel );
+	feature_reg = ( opts.ecx ? feature_regs->ecx : feature_regs->edx );
+
+	/* Check presence of specified feature */
+	return ( ( feature_reg & ( 1 << bit ) ) ? 0 : -ENOENT );
+}
+
+/** x86 CPU feature detection command */
+struct command cpuid_command __command = {
+	.name = "cpuid",
+	.exec = cpuid_exec,
+};